. 2023 Jun 24;24:520. doi: 10.1186/s12891-023-06620-6

Table 1.

Comparison of baseline data between the two groups

	Structural bone graft (N = 51)	Non-structural bone graft (N = 54)	P Value
Gender (male / female)^a	24/27	31/23	0.289
Age (year)^b	34(22–76)	35(21–75)	0.783
BMI (kg/m²) ^c	21.1 ± 2.3	21.5 ± 2.5	0.353
Paravertebral abscess (yes/no) ^a	35/16	35/19	0.679
Follow up time (month) ^b	31 (24–66)	32 (24–63)	0.835

^a The categorical variables were compared by Chi-square test

^b The non-normally distributed continuous variables were presented as median (range) and compared by Mann-Whitney U test

^c The normally distributed continuous variables were presented as mean ± standard deviation and compared by independent sample t-test